Findings of research seeking predictors of mature creative achievement in the early artistic development of the Swiss painter, Paul Klee; the French painter, Henri Toulouse-Lautrec; and the Spanish painter and sculptor, Pablo Picasso are presented. Discussion is organized into four sections. The first section offers an overview, rationale, and summary of the research. The second section presents material which illustrates the normal developmental aspects of graphic growth for each of the three artists. The third section illustrates aspects of the apprenticeship process for each of the three, and the fourth section presents those aspects of the record which suggest the presence of significant creative potential. In all three cases juvenalia was defined as material completed up to the age of 20 years. Findings indicated that, when young, all three artists experienced difficulties in mastering spatial organization, proportion, and line control. All copied from popular sources, such as comic strips and calendars. All three had a repertoire of stereotyped images which they used for their own private purposes, like other normal children. Comparison with normal children reveals that the three are distinguished by accelerated acquisition of the graphic stages. In general, thematic preferences evident in the artists' juvenile work were evident in their mature works. (RH)